Miscella7i eous. 171 



The Mollusks will, no doubt, afford a rich harvest of novelties, 

 among which some may be of the deepest zoological interest. It 

 stands to reason that a variety of NautUoid Cephalopods may be 

 discovered when Nautilus proper and Spirula are so rarely found 

 alive ; and among new forms there may be those combining characters 

 of Argonauta with features of Nautilus ; some may even be coiled 

 up like Turrilites. Belemnitic Squids would appear natural. Among 

 Gasteropods we may look for high-spired Natica-YikG types, for re- 

 presentatives of Actceonella, Avellana, and the like — for small Volu- 

 toids of the tertiary and cretaceous types, for Rostellarias, even for 

 Nerinaeas, and more particularly for forms intermediate between 

 Firula and Cyprcea. Among Acephala I should expect a variety of 

 Myacea approaching those described in my monographs of that family 

 from the Jurassic and cretaceous formations, such as Ceromya, Co- 

 rimya, Circomya, Ooniomya, Myopsis, &c., with Panopcea and Fho- 

 ladomya, and others recalling perhaps also Cardinia, Oresslya, or 

 Cardiacea more closely related to Conocardium than the living 

 species, perhai)s leading to Opis, or Trigonice of extinct types akin 

 to Myophoria, with Pacliymya, Diceras, Grammisia, Inoceramus, 

 Pterinea, Monotis, and Posidonia. Rudistes should take the place 

 of oysters ; and the harvest of Brachiopods should be large. 



Among Crustacea it is natural to suppose that genera may be dis- 

 covered reminding us of Eryon or of Pemphyx, Qampsonyx, or some 

 Amphipods, and Isopods aping still more closely the Trilobites than 

 Serolis, or Limuloids approaching that extinct family. The classi- 

 fication, embryology, and order of succession of Echinoderms is now 

 so well known that it is perhaps still more easy to anticipate the 

 character of discoveries in this branch of the animal kingdom than 

 in any other. I expect, confidently, to find Spatangoids approach- 

 ing Uolaster, Toxaster, AnancJiyies, Hemipneustes, or Metaporhinus, 

 and others akin to Dysaster, Echinolamps approaching Pygurus, 

 Nucleolites tending to Clypeus, Galerites like Pyrina or Glohator, 

 &c. &c., and, again, Cidarids akin to C. glandifera and clavigera, with 

 Glypticus-\ike species, and Codiopsis, Coelopleurus, Cyphosoma, and 

 Salenia. 



Among Starfishes the types of Goniaster and Luidia are likely to 

 prevail, with simj)le-rayed Euryaloid genera, and among Crinoids a 

 variety of genera reminding us of Pentremites, Marsupites, Penta- 

 crinus, Apiocrinus, and Eugeniacrinus. 



The question of the affinities of MiUepora will probably receive 

 additional evidence ; and genera connecting more closely the Rugosa 

 and Tabulata with one another and with the Acalephs may be ex- 

 pected in the shape of branching Heliopores and the like. 



With the monograph of Pourtales upon the deep-sea corals before 

 me, it would be sheer pretence to say any thing concerning the 

 prospect of discovering new representatives of this or that typo. 

 His tables point them out already. 



But there is a subject of great interest likely to be elucidated by 

 our investigation — the contrast of the deep-sea faunae of the nor- 

 thern with those of the southern hemisphere. Judging from what 



12* 



